JP4107465B2 - Vehicle with watering device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle provided with a watering device.
[0002]
[Prior art]
At quarries and cement factories, a large amount of dust is generated by work, which may adversely affect the surrounding environment. For this reason, it is necessary to spray water in the field and to suppress the scattering of dust. In particular, in a large field, not only manual work but also fixed watering equipment cannot be covered, so a vehicle equipped with a watering device that can spray water while moving is often used.
[0003]
An example of a conventional vehicle equipped with a watering device will be described with reference to FIG.
FIG. 4 is an external view of a watering wheel described in Japanese Utility Model Publication No. 63-31117.
The vehicle includes a watering device 31 at the front end of the vehicle body in front of the cab 30, a water pump device 32 at the rear of the cab 30, and a water tank 33 at the rear of the water pump device 32. The water pump device 32 draws water from the water tank 33, pressurizes it, sends it to the watering device 31, and the watering device 31 sprays this water.
[0004]
The watering device 31 includes a watering nozzle 33 that can be swung by a swiveling hydraulic cylinder (not shown) and can be swung by a hoisting hydraulic cylinder (not shown). The operation switching of the water pump device 32 and the expansion / contraction switching of the swing hydraulic cylinder and the undulation hydraulic cylinder can be performed from within the cab 30.
With this configuration, the start / stop control of watering, the control of the watering direction, and the control of the watering distance can be performed even during traveling, and watering work can be performed efficiently over a wide range.
[0005]
[Problems to be solved by the invention]
However, the conventional watering vehicle has the following problems.
(1) In general, many watering vehicles have been modified from general-purpose truck chassis on the premise of running on paved roads, and at quarry sites in the mountains with many rough terrain, they may become unable to move due to lack of climbing ability or running ability.
(2) When the required watering capacity increases, the water pump device 32, the water tank 33, and the watering device 31 also become larger and heavier, making it difficult to attach and detach them.
[0006]
The present invention has been made with the aim of solving at least one of the above-mentioned problems, and is provided with a watering device that excels in running ability and climbing ability on rough terrain and has good workability and maintainability. The purpose is to provide vehicles.
[0007]
[Means, actions and effects for solving the problems]
In order to achieve the above object, the present invention provides a vehicle including a water tank, a water pump device, and a watering device having at least one watering nozzle that can be operated in the direction of the driver's cabin by expansion and contraction of a hydraulic cylinder. In
Using an off-road dump truck for the base vehicle,
A water tank was installed in the loading platform of this off-road dump truck,
The watering nozzle whose direction can be freely controlled is provided with a hydraulic system unit formed by integrating at least an electric motor, a hydraulic pump driven by the electric motor, and a hydraulic oil tank that absorbs hydraulic oil corresponding to volume fluctuations during expansion and contraction. In addition to having two hydraulic cylinders, each hydraulic cylinder can be raised and lowered and turned freely.
Further, the water pump device is desirably provided at the rear part of the loading platform, and as a means for operating the direction of the watering nozzle, a controller having a joystick lever is desirable.
[0008]
According to the above configuration, the following effects can be obtained.
(1) Since it is based on an off-road dump truck, it has the same climbing power and running ability as other work vehicles operating at the quarry site, and does not get stuck on steep slopes or mud.
(2) Since the water tank is provided in the loading platform based on the off-road dump truck, the water tank can be lifted up by itself and the maintenance work is facilitated.
(3) By using an integrated hydraulic system unit (that is, self-contained as a hydraulic circuit) as a hydraulic cylinder for turning / undulating the water nozzle, the hydraulic piping can be attached and detached even when the hydraulic cylinder or hydraulic system unit is repaired. Since it is not required and assembly replacement at the site can be easily performed, the downtime can be minimized and the construction period can be shortened. In addition, since there is no pipe connecting the external device and the hydraulic cylinder, it is not necessary to take protective measures for the hydraulic pipe, such as installing a protective plate or reinforcing the hose, and the manufacturing cost can be reduced.
(4) Since the water pump device is provided on the loading platform like the water tank, the distance from the water tank changes due to the lifting and lowering of the loading platform when the water pump device is mounted on the chassis side as in the past. It is not necessary to provide a movable mechanism such as a reel or a bellows in the connection pipe between the water pump device and the water tank in order to absorb water, and the piping is not complicated. The piping is simplified and the manufacturing cost is reduced.
(5) By providing the water pump device at the rear part of the loading platform, the center of gravity of the water tank moves forward and becomes closer to the center in the longitudinal direction of the vehicle body. For this reason, even if the amount of water in the water tank changes, the back and forth movement of the center of gravity of the vehicle body is suppressed to a minimum, and traveling stability is improved.
(6) The joystick lever can be raised and lowered while imagining the movement of the watering nozzle, that is, the operation means (joystick lever) and the operation target (watering nozzle) are similar to each other. More accurate operation than using buttons and buttons is possible.
DETAILED DESCRIPTION OF THE INVENTION
[0009]
Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1, 2, and 3. In addition, the same code | symbol is attached | subjected about the part which is common in what was described in the term of the prior art, and description is abbreviate | omitted.
[0010]
First, an entire vehicle according to an embodiment of the present invention will be described with reference to FIG.
FIG. 1 is an external view of a vehicle including a watering device according to an embodiment of the present invention.
A water pump device 2 is provided at the rear part of the loading platform 1 of the off-road dump truck, a rear watering nozzle 3 is provided at the rear end of the water pump device 2, an upper watering device 4 is provided on the upper surface of the loading platform 1, and the rest of the loading platform 1 The water tank 5 is provided in the most part. By providing the water pump device 2 at the rear of the loading platform 1, the center of gravity of the water tank 5 is closer to the front of the loading platform 1 and closer to the center with respect to the entire vehicle.
The loading platform 1 can be lifted in the same manner as the original off-road dump truck.
[0011]
The water pump device 2 draws water from the water tank 5 and discharges the water from the rear watering nozzle 3 and the upper watering device 4.
The upper watering device 4 has an upper watering nozzle 6 that can be swung and raised and lowered by a mechanism that will be described later.
Control of the water pump device 2 and the turning and undulation of the upper watering nozzle 6 are performed by an electrical signal from a controller 7 provided in the driver's seat 10. The operator operates the controller 7 to control the operation of the water pump device 2 and the direction of the upper watering nozzle 6. A joystick lever 7 a is provided as means for operating the direction control of the upper watering nozzle 6 provided in the controller 7.
[0012]
A mechanism for changing the direction of the upper watering nozzle 6 will be described in detail with reference to FIG.
FIG. 2 is a detailed view of the upper watering nozzle 6.
A branch pipe 8 having a bifurcated distal end is pivotally supported on the loading platform 1 by a swivel swivel joint 8a whose base end is rotatable about a vertical axis. At the tip of each branch pipe 8, there are provided undulating swivel joints 8b, 8b facing each other so as to be able to rotate on the same rotational axis, and these two undulating swivel joints 8b, 8b are connected to the water spray nozzle 6. The base end is pivotally supported. The rotating shafts of the undulating swivel joints 8b and 8b are substantially orthogonal to the rotating shaft of the swivel swivel joint 8a.
Water from the water pump device 2 is introduced into the branch pipe 8 through the swivel swivel joint 8a and branches into two branches. The branched water is introduced into the watering nozzle 6 through the undulating swivel joints 8b and 8b, and then discharged from the tip of the watering nozzle 6.
[0013]
The rod side of the hoisting hydraulic cylinder 11 is pivotally supported at the distal end of the hoisting arm 6a whose base end is fixed to the upper watering nozzle 6, and the bottom of the hoisting hydraulic cylinder 11 is fixed to the flange 8c fixed to the base end of the branch pipe 8. The side is pivotally supported. When the hoisting hydraulic cylinder 11 expands and contracts, the upper watering nozzle 6 rotates around the shafts of the hoisting swivel joints 8b and 8b, and the tip of the upper watering nozzle 6 moves up and down.
The rod side of the turning hydraulic cylinder 12 is pivotally supported at the distal end portion of the turning arm 8d whose base end is fixed to the flange 8c, and the bottom side of the turning hydraulic cylinder 12 is pivotally supported on the loading platform 1 side. When the turning hydraulic cylinder 12 expands and contracts, the upper watering nozzle 6 and the branch pipe 8 rotate around the axis of the turning swivel joint 8a, and the tip of the upper watering nozzle 6 moves horizontally.
By the operation described above, the direction of the upper watering nozzle 6 can be freely changed by expanding and contracting the hoisting hydraulic cylinder 11 and the turning hydraulic cylinder 12.
[0014]
By the way, the above-described hydraulic cylinder 11 for undulation and hydraulic cylinder 12 for rotation are each integrally provided with a self-contained hydraulic system unit 20 having an electric pump and a hydraulic oil tank. The expansion and contraction operation is possible without the exchange of hydraulic oil.
A hydraulic circuit configuration of a hydraulic cylinder integrated with a self-contained hydraulic system unit 20 that enables such an operation will be described in detail below with reference to FIG.
It should be noted that a hydraulic cylinder having a configuration equivalent to the following configuration is described in JP-A-9-4608.
[0015]
FIG. 3 is a circuit diagram of a hydraulic cylinder in which a self-contained hydraulic system unit 20 having an electric pump and a hydraulic oil tank is integrated.
A first port 22a of a pump 22 having a motor 21 capable of forward and reverse rotation and capable of discharging in both directions from the first port 22a to the second port 22b and from the second port 22b to the first port 22a; The two ports 22b are connected to the bottom side 23a of the cylinder body 23 via the bottom side pilot check valve 24 and to the head side 23b of the cylinder body 23 via the head side pilot check valve 25, respectively. The bottom side pilot check valve 24 always allows flow from the first port 22a to the cylinder bottom side 23a, and allows flow from the cylinder bottom side 23a to the first port 22a only when the second port 22b is boosted. .
The head side pilot check valve 25 always allows the flow from the second port 22b to the head side 23b of the cylinder body 23, and the flow from the head side 23b of the cylinder body 23 to the second port 22b only when the first port 22a is boosted. Is possible.
Relief valves 26 and 26 are directly connected to the bottom side 23a and the head side 23b of the cylinder body 23, respectively, and the pressure oil on the bottom side 23a and the head side 23b is returned to the tank 27, thereby generating abnormal high pressure. Is preventing.
[0016]
The first port 22a and the second port 22b are connected to the tank 27 via the switching valve 28, respectively.
The switching valve 28 normally blocks the tank 27 and the first port 22a and the second port 22b from each other, and communicates between the tank 27 and the second port 22b when the first port 22a is boosted. The first port 22a is blocked, and when the pressure of the second port 22b is increased, the tank 27 and the first port 22a are communicated to block the second port 22b.
[0017]
When the controller 7 is operated to supply electric power from the outside to rotate the motor 21 in the forward direction, the pump 22 sucks the hydraulic oil from the second port 22b, raises the pressure, and discharges it from the first port 22a. To the bottom side 23a of the cylinder, and the cylinder body 23 is extended. At this time, the hydraulic oil on the head side 23b of the cylinder body 23 returns and is sucked in from the second port 22b. However, due to the volume difference between the head side and the bottom side, the flow rate of the return oil in the cylinder body 23 is just the suction flow rate. Less than. Here, since the switching valve 28 communicates between the tank 27 and the second port 22b by the above operation, the pump 22 can suck the insufficient amount of hydraulic oil from the tank 27.
When the controller 7 is operated to supply electric power from the outside to reverse the electric motor 21, the pump 22 sucks the hydraulic oil from the first port 22a, raises the pressure and discharges it from the second port 22b. The cylinder body 23 is contracted by supplying to the head side 23b. At this time, the hydraulic oil on the bottom side 23a of the cylinder body 23 returns and is sucked from the first port 22a, but the flow rate of the return oil of the cylinder body 23 exceeds the suction flow rate due to the volume difference between the head side and the bottom side. . Here, since the switching valve 28 communicates between the tank 27 and the first port 22a by the above operation, the excess hydraulic oil that cannot be sucked by the pump 22 out of the return oil of the cylinder body 23 is returned to the tank 27. Can do.
[0018]
By the operation described above, the hydraulic cylinder integrated with the self-contained hydraulic system unit 20 having the above-described configuration can be expanded and contracted only by supplying electric power from the outside without exchanging hydraulic oil with the outside. Therefore, by using this as the turning hydraulic cylinder 12 and the undulating hydraulic cylinder 11, the direction of the upper watering nozzle 6 can be controlled with only electrical wiring without the need for hydraulic piping.
[0019]
As described above, according to the embodiment, the following effects can be obtained according to the present invention.
(1) Since it is based on an off-road dump truck, it has the same climbing power and running ability as other work vehicles operating at the quarry site, and does not get stuck on steep slopes or mud.
(2) Since the water tank 5 is provided in the loading platform 1 on the basis of the off-road dump truck, the water tank 5 can be lifted up by the loading platform 1 by itself, and particularly the maintenance work of the lower part of the vehicle body becomes easy.
(3) By using a self-contained hydraulic system unit 20 integrated as the turning hydraulic cylinder 12 and the undulating hydraulic cylinder 11 of the upper watering nozzle 6, even when the hydraulic cylinder or the hydraulic system unit 20 is repaired, Since hydraulic piping is not required to be attached and removed, and assembly replacement on site is easy, the vehicle downtime is minimized and the construction period can be shortened. In addition, since there is no pipe connecting the external device and the hydraulic cylinder, it is not necessary to take protective measures for the hydraulic pipe, such as installing a protective plate or reinforcing the hose, and the manufacturing cost can be reduced.
(4) By providing the water pump device 2 on the loading platform 1 in the same manner as the water tank 5, when the water pump device 2 is mounted on the chassis side as in the prior art, the distance from the water tank 5 varies as the loading platform 1 moves up and down. Therefore, it is not necessary to provide a movable mechanism such as a reel or a bellows in the connection pipe between the water pump device 2 and the water tank 5 in order to absorb this, and the pipe is not complicated. The piping between the water tank 5 is simplified and the manufacturing cost is reduced.
(5) By providing the water pump device 2 at the rear part of the loading platform 1, the center of gravity of the water tank 5 moves forward and becomes closer to the center in the longitudinal direction of the vehicle body. For this reason, even if the amount of water in the water tank 5 changes, the back-and-forth movement of the center of gravity of the vehicle body is suppressed to a minimum, and traveling stability is improved. (6) The joystick lever 7a can be raised and lowered while imagining the movement of the upper watering nozzle 6; that is, the way of movement of the operating means (joystick lever 7a) is similar to the way of movement of the operation target (upper watering nozzle 6). Therefore, for example, more accurate operation than using a dial or a button becomes possible.
[Brief description of the drawings]
FIG. 1 is an external view of a vehicle including a watering device according to an embodiment of the present invention.
FIG. 2 is a detailed view of an upper watering nozzle.
FIG. 3 is a circuit diagram of a hydraulic cylinder integrated with a self-contained hydraulic system unit.
FIG. 4 is an external view of a vehicle equipped with a conventional watering device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Loading platform, 2 ... Water pump apparatus, 5 ... Water tank, 6 ... Upper water spray nozzle, 7 ... Controller, 7a ... Joystick lever, 10 ... Driver's seat, 11 ... Hydraulic cylinder for raising / lowering, 12 ... Hydraulic cylinder for turning, 20 ... self-contained hydraulic system unit, 21 ... electric motor, 22 ... pump.

Claims (3)

In a vehicle comprising a water tank, a water pump device, and a watering device having at least one watering nozzle that can be operated from the driver's cab by extending and contracting a hydraulic cylinder.
Using an off-road dump truck for the base vehicle,
A water tank (5) is provided in the loading platform (1) portion of the off-road dump truck, and a watering nozzle (6) whose direction can be freely controlled is at least an electric motor (21) and a hydraulic pressure driven by the electric motor (21). Two hydraulic cylinders (11, 12), each fitted with a hydraulic system unit (20), each of which integrates a pump (22) and a hydraulic oil tank (27) that absorbs the hydraulic fluid corresponding to the volume fluctuation during expansion and contraction And a vehicle equipped with a watering device, characterized in that it can be raised and lowered by each hydraulic cylinder (11, 12). 2. The vehicle with a watering device according to claim 1, wherein the water pump device (2) is provided in the rear part of the loading platform (1). The watering according to claim 1 or 2, wherein a controller (7) having a joystick lever (7a) is provided in the driver's seat (10) as means for operating the direction of the watering nozzle (6). A vehicle equipped with a device.

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